Malicious PDF — malware analysis report

Static analysis result for SHA-256 912f8991dbdd22cf…

MALICIOUS

PDF

44.3 KB Created: 2020-08-31 12:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aa6bca1ac732b7c183783943ae52bd5 SHA-1: 29d2b36257a0e0ad30e396c69f5ebb41ffa9e991 SHA-256: 912f8991dbdd22cfb1adb0a0000992abfa184c44d736a48db2a7a9f7b1366776
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to external resources, which is indicative of a link farm or SEO poisoning technique. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'skilled occupation list new south wales australia 2019' and the malicious URL, suggesting a lure to a phishing or scam page. The presence of numerous benign-looking PDF links from static.usrfiles.com and cdn.shopify.com likely serves to mask the malicious redirector.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=skilled+occupation+list+new+south+wales+australia+2019
    • https://static.usrfiles.com/ugd/01e791_70ef722c6aa64bb5ae2a2b034a77311b.pdf
    • https://static.usrfiles.com/ugd/87d215_6ce36516634443db9ecd91a703d27ec1.pdf
    • https://static.usrfiles.com/ugd/69695d_58261a262a6b4de082f55da5163d5225.pdf
    • https://static.usrfiles.com/ugd/2b25b5_a9ce18f1d4a44efb9ceac3a361890d47.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/31858054820.pdf
    • https://cdn.shopify.com/s/files/1/0435/5345/6289/files/experienced_resume_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0461/9114/9214/files/29941882980.pdf
    • https://cdn.shopify.com/s/files/1/0437/2729/0518/files/research_methods_in_agricultural_extension.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/bejelalirunimudabuwip.pdf
    • https://static.usrfiles.com/ugd/9ec29b_9bbc3cfd83b548f29b49a17582e07776.pdf
    • https://static.usrfiles.com/ugd/912de2_828ce471f52d4cdf9a80e589f34ac79c.pdf
    • https://static.usrfiles.com/ugd/4b7290_6650798aaecb453482aa2a7706ea0e73.pdf
    • https://static.usrfiles.com/ugd/1e4819_79f21a7c05094935911ba12e0897e3f5.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/34267784561.pdf
    • https://cdn.shopify.com/s/files/1/0435/4614/9023/files/kozonelivaler.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c5b.bin
8dadbd90c58a7bbdf741cbbe24ffefd3ab2233505ea0b06d0af2816a73827438		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5B 5904 bytes
font_01_sfnt_off0000807a.bin
31519f151d863546d259dc0031dc053878173a8cb34e59c2b21ad698d7efeaf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x807A 10412 bytes

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